/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.prestosql.plugin.hive.metastore.thrift;

import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableList;
import io.airlift.configuration.Config;
import io.airlift.configuration.ConfigDescription;
import io.prestosql.spi.function.Mandatory;

import javax.validation.constraints.NotNull;

import java.net.URI;
import java.util.List;

import static com.google.common.collect.Iterables.transform;

public class StaticMetastoreConfig
{
    private static final Splitter SPLITTER = Splitter.on(',').trimResults().omitEmptyStrings();

    private List<URI> metastoreUris;
    private String metastoreUsername;

    @NotNull
    public List<URI> getMetastoreUris()
    {
        return metastoreUris;
    }

    @Mandatory(name = "hive.metastore.uri",
            description = "The URI(s) of the Hive metastore to connect to using the Thrift protocol. If multiple URIs are provided, the first URI is used by default and the rest of the URIs are fallback metastores. This property is required. Example: thrift://192.0.2.3:9083 or thrift://192.0.2.3:9083,thrift://192.0.2.4:9083",
            defaultValue = "thrift://host:port",
            required = true)
    @Config("hive.metastore.uri")
    @ConfigDescription("Hive metastore URIs (comma separated)")
    public StaticMetastoreConfig setMetastoreUris(String uris)
    {
        if (uris == null) {
            this.metastoreUris = null;
            return this;
        }

        this.metastoreUris = ImmutableList.copyOf(transform(SPLITTER.split(uris), URI::create));
        return this;
    }

    public String getMetastoreUsername()
    {
        return metastoreUsername;
    }

    @Config("hive.metastore.username")
    @ConfigDescription("Optional username for accessing the Hive metastore")
    public StaticMetastoreConfig setMetastoreUsername(String metastoreUsername)
    {
        this.metastoreUsername = metastoreUsername;
        return this;
    }
}
